CentOS WHM Server Boot Failure Repair

My CentOS WHM server is currently down due to a boot failure, and I need assistance logging in via rescue mode to fix the boot issue. The problem arose after I installed some new software and updates, and I do not have any recent backups available.

- Main Issue: Boot failure
- Recent Changes: Installation of new software/updates
- Backups: No recent backup available

Ideal Skills and Experience:
- Extensive knowledge of CentOS and WHM
- Expertise in diagnosing and repairing boot issues
- Experience with rescue mode
- Familiarity with handling servers without recent backups
- Proficient in troubleshooting after software updates and installations